My grandfather was quoted $4000 to run a coax cable 500 feet to the street
Google Fiber is claiming about $700/house to run fiber thousands of feet from the CO to the house, but not including hooking up and all that. The average cost of a brand new rural fiber roll out, which means all new equipment, is about $3k/house, and that includes EVERYTHING, not just running the line.
The only reason it costs so much for these kinds of quotes is they are one offs. When my ISP rolled out fiber, they already had a trenching crew in the area, so they ran fiber to EVERY house, customer or not. It's a lot cheaper in the long run.
"Gravitation cannot be held responsible for people falling in love." -- Albert Einstein